☣️ UN 3242 • CLASS 4
UN 3242 — Azodicarbonamide
Placard: Flammable Solid. ERG Guide 149. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
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⚠️ This page is a quick-reference aid. For real incidents: stage upwind, isolate, deny entry, request Hazmat early, and consult the current ERG + SOP/SOG.
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UN 3242 Quick Details
UN 3242
Product name: Azodicarbonamide
DOT Class: 4
Placard type: Flammable Solid
ERG Guide: 149 (check current ERG)
Initial isolation: ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isolate 800m initial, evacuate 1600m downwind.
Common Hazards of UN 3242
- Self-decomposition, self-polymerization, or self-ignition may be triggered by heat, chemical
- May be ignited by heat, sparks or flames.
- Some may decompose explosively when heated or involved in a fire.
- Those substances designated with a (P) may polymerize explosively when heated or involved in a fire.
- May burn violently. Decomposition or polymerization may be self-accelerating and produce large
- Vapors or dust may form explosive mixtures with air.
- Inhalation or contact with vapors, substance or decomposition products may cause severe injury or
- May produce irritating, toxic and/or corrosive gases.
Chemical Identity & Physical Properties
| Also known as | ADAADCAAzoformamideAzobisformamidePorofor ADC1,1'-Azobisformamide |
| CAS Number | 123-77-3 |
| Appearance | Yellow to orange-red crystalline powder or granules. Odorless or slight ammonia-like odor. Solid at room temperature. |
| Flash Point | Not applicable (decomposes before melting) |
| Boiling Point | Not applicable (decomposes at approximately 195-215C/383-419F) |
| Vapor Density | Not applicable (solid) |
| Water Reactivity | No significant reaction with water under normal conditions |
Chemical details are general reference only. Always verify with current SDS, ERG, and SOP/SOG.
Fireground Response Guidance — UN 3242
Extinguishing Media
Dry chemical, CO2, water spray. Avoid using heavy water streams on bulk material.
PPE Requirements
⚠️ Level B minimum for spills; full structural firefighter PPE with SCBA for fires. Avoid dust inhalation.
Isolation & Evacuation
ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isolate 800m initial, evacuate 1600m downwind.
Always confirm protective actions with the current edition of the Emergency Response Guidebook (ERG Guide 149).
First Actions for a UN 3242 Incident
- CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
- Keep unauthorized personnel away.
- Stay upwind, uphill and/or upstream.
- Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
- Consider initial evacuation for at least 250 meters (800 feet) in all directions.
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📋 Copy & Share Field Card
UN 3242 — AzodicarbonamideHAZMAT RADIO NOTE — UN 3242
Product: Azodicarbonamide
Class 4 / Flammable Solid / ERG 149
PPE: Level B minimum for spills; full structural firefighter PPE with SCBA for fires. Avoid dust inhalation.
ISOLATION: ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isolate 800m initial, evacuate 1600m downwind.
ACTION: Stage upwind · Isolate · Deny entry · Request HazmatRADIO
Use for: Quick radio or face-to-face size-up. Short, structured, field-ready.
=== IC HAZMAT BRIEFING ===
UN 3242 — Azodicarbonamide
Class: 4 | Placard: Flammable Solid | ERG Guide: 149
Appearance: Yellow to orange-red crystalline powder or granules. Odorless or slight ammonia-like odor. Solid at room temperature.
Water Reactivity: No significant reaction with water under normal conditions
Extinguishing: Dry chemical, CO2, water spray. Avoid using heavy water streams on bulk material.
PPE: Level B minimum for spills; full structural firefighter PPE with SCBA for fires. Avoid dust inhalation.
Isolation: ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isolate 800m initial, evacuate 1600m downwind.
— Key Hazards —
• Self-decomposition, self-polymerization, or self-ignition may be triggered by heat, chemical
• May be ignited by heat, sparks or flames.
• Some may decompose explosively when heated or involved in a fire.
— First Actions —
• CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper
• Keep unauthorized personnel away.
• Stay upwind, uphill and/or upstream.
• Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters
SOURCE: allfirefighter.com/hazmat/un/3242 | Always use current ERG + SOP/SOGIC BRIEFING
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief. Full chemical + response details.
UN3242 Azodicarbonamide Cls4 ERG149 | ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isola | allfirefighter.com/hazmat/un/3242SMS / 160 CHAR
Use for: Quick text to command or incoming units. Fits in a single SMS. Includes link to full page.
⚠️ Quick-reference only. Always use current ERG + SOP/SOG for incident-specific actions.
Page: https://allfirefighter.com/hazmat/un/3242
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Frequently Asked Questions about UN 3242
Self-decomposition, self-polymerization, or self-ignition may be triggered by heat, chemical May be ignited by heat, sparks or flames. Some may decompose explosively when heated or involved in a fire. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. May burn violently. Decomposition or polymerization may be self-accelerating and produce large Vapors or dust may form explosive mixtures with air. Inhalation or contact with vapors, substance or decomposition products may cause severe injury or May produce irritating, toxic and/or corrosive gases.
CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper Keep unauthorized personnel away. Stay upwind, uphill and/or upstream.
Level B minimum for spills; full structural firefighter PPE with SCBA for fires. Avoid dust inhalation.
Water reactivity: No significant reaction with water under normal conditions. Recommended extinguishing: Dry chemical, CO2, water spray. Avoid using heavy water streams on bulk material..
ERG Guide 149 recommendation: ERG 149: isolate spill area 25-50m all directions. If fire or large spill, isolate 800m initial, evacuate 1600m downwind.
No. This is a training/quick-reference aid only. Always consult the current ERG Guide 149 and your department SOP/SOG for incident-specific protective actions.
Sources (high level): DOT/PHMSA marking & class concepts + ERG usage principles.
This page does not reproduce ERG guide text—always consult the current ERG for incident-specific protective actions.